Tough BMIMCl-based ionogels exhibiting excellent and adjustable performance in high-temperature supercapacitors

Influence of Temperature on Supercapacitor Performance

“…Long-term cyclic stability of IL-polymer gel electrolytes at higher temperature is usually inferior to that at lower temperatures. For instance, IL-based supercapacitors showed more capacitance loss at 200°C than at 100°C over 500 cycles [42]. However, this is opposite to the trend that observed with supercapacitors based on acid/base-containing polymer gel electrolytes [40].…”

“…IL-based polymer gel electrolytes display better electrochemical performance at high temperatures due to increased ionic conductivity relative to low temperatures [42]. Compared to other types of polymer gel electrolytes (see Table 4.4), the influence of temperature on the capacitance is more substantial, with capacitance increasing by up to 2500 % at different high temperatures relative to room temperature.…”

“…retention over 2,000 cycles at 100°C [42] Note Room temperature (RT) was chosen at 25 or 27°C, except for some literature choosing 20°C, indicated by (a) using other electrolytes. For asymmetric supercapacitors based on alkaline polymer gel electrolyte, the energy density variation with temperature follows the same tendency.…”

Rapid microwave-assisted synthesis of mesoporous NiMoO4 nanorod/reduced graphene oxide composites for high-performance supercapacitors

“…With the decreasing amount of fossil fuels and the increasingly urgent concern about the negative impact of fossil fuels on the environment, one of the most enormous challenges facing mankind is the search for alternative green and sustainable energy resources [1][2][3]. In recent years, supercapacitors have attracted remarkable interest owing to their high power densities, long-term cycling stability, and fast charge/discharge rates [4,5].…”

Elastic ionogels with freeze-aligned pores exhibit enhanced electrochemical performances as anisotropic electrolytes of all-solid-state supercapacitors

“…[5][6][7][8][9][10] Whereas, ionic conducting polymer gels with aligned structures have promising applications in modern electronics and multidisciplinary fields due to their accelerated ionic transports in large pores, semi-solid state and flexibility compared to some inorganic solid electrolytes. [11][12][13][14][15] Conventional polymer electrolytes prepared by the physical mixing and in-situ polymerization methods can be used in flexible and portable electric devices, such as electroactive actuators, [16][17][18] supercapacitors, [19][20][21][22] lithium batteries, 23 dye sensitized solar cells 24 and fuel cells. 25 However, they can hardly balance the confliction between maintaining necessary mechanical strength and electrochemical properties due to the lack of hierarchical structure within the gel matrix.…”